1Hook Base: The base of the latch hook adopts well riveted and carbon dioxide welded technology to prevent shedding, for long lasting use. 2 Material: Forged from upgraded premium solid thickened 304 stainless steel, the surface is polished and resistant to marine climate. 3Function: Ideal for fixing in the opening position of the door and window, which is windproof, and can suppress the natural opening of the window or door, safe and silent. 4Fast Operation: The simple unlocking design of the hook allows you to unlock the latch quickly, eliminating the need to look for the key in an emergency, providing you with safety in any situation. 5Easy to Install: This privacy hook is durable and sturdy which is easy to install, and you only need a screwdriver (not provided) to install it.